Note: There are other authors with the same name: William Simpson (I)
- Author: William Simpson Author Record # 127960
- Language: English
- Note: Artist for comics, books, and films; resident of Northern Ireland for 17 years as of 2004. --Land of the Lost Mammoths, p.  (viewed as "Look inside" at Amazon) Simpson was a friend of the author's daughter in Belfast when selected to illustrate Lost Mammoths with "line drawings of icy landscapes, Vikings and strange birds, all surrounded by runes and Celtic designs". --Los Angeles Times 2004-03-03 pE9, "Mike Davis makes a mammoth shift"